Apparatus for pasteurizing milk and other substances



y 1935. A. G. ENOCK 2,000,514

APPARATUS FOR PASTEURIZING MILK AND OTHER SUBSTANCES Filed Jan. 22, 1934 3 Sheets-Sheet 1 H E Hi E 1 0 0 0 .1 I 1 i 2 i 0 1 5 i B 5 A. G. ENOCK May 7, 1935.

APPARATUS FOR PASTEURIZING MILK AND OTHER SUBSTANCES 5 Sheets-Sheet 2 Filed Jan. 22, 1954 INVENTOR E 5 K 1/: 2-2 ZZzziza away/Q A. G. ENOCK APPARATUS FOR PASTEURIZINQ MILK AND OTHER SUBSTANCES 3 Sheets-Sheet 3 Filed Jan. 22, 1934 INVENTOR Patented May 7, 1935 l g V UNITED STATES PATENT OFFICE.

APPARATUS FOR PASTEURIZING MILK AND OTHER SUBSTANCES Arthur Guy Enock, Wembley Park, England Application January 22, 1934, Serial No. 707,700 In Great Britain January 27, 1933 Claims. (Cl. 126-272) The invention relates to apparatus for pasteurinrush or outrush of air to or from the respective izing milk or other liquids or substances in botchambers as the bottles or containers pass into-or tles or containers. out of the chambers.

Apparatus has been proposed comprising three In apparatus for treating single bottles the 5 vertical chambers to contain dry air the first conveyers may be moving bands upon which the 5 chamber containing air maintained at the rebottles may be placed and in apparatus for treatquired pasteurizing temperature (usually 145 to ing bottles grouped in crates the conveyers may 150 F.), thesecond chamber having a current be endless moving chains constructed with lugs of air at atmospheric temperature circulated to engage the crates or to engage trolleys upon therethrough and the third and final chamber which the crates or the bottles are loaded.- 10

having chilled or refrigerated air circulated The heatin c ambe A s fi ed with a Steam through it, the bottles or containers being carried heating coil e over which air is forced in a closed through the chambers, either singly or in crates, circuit by a powerful fan el to maintaina conby conveyers which are moved in an up and down stant temperature of 145 to 150 F. in the champath in the chambers. her A the air being continuously circulated The object of the invention is to provide apthro h h ducts In the base of the champaratus for carrying out the method of pasteurher A a slowly moving chain conveyer D is izing in which the heating, cooling and refrigeratmounted by which the C ates G co a he ing treatment is effected by-air alone at various t s of k are t V d w y h h e temperatures. chamber. '20.

The invention comprises a plurality of cham- The cooling chamber B is similar tothe chambers in alignment disposed horizontally and mainher A fitted with a slow moving chain conveyer 'tained at different temperatures throug which Dl in the base and. with app El or t eatthe bottles or containers, whether singly or in ing'and cooling atmospheric air and forcing it groups, are moved on a horizontal plane, autointo the chamber. 5

matic conveyers by which the bottles or contain- The apparatus E comprises a number of water ers are moved progressively through the chamcooled baflies H over which the air passes and a bers, air looks at the inlet to and outlet from and powerful fan Hl by which it is forced through between the several chambers, doors or shutters louvres h into the chamber to meet the groups to the air locks operated preferably automaticalof advancing'bottles. A second fan H2 forces 30- ly and means adjacent to each of theseveral air in at the other end of the'chamber over a chambers to condition the air to raise or lower fine water spray tQ'COO]. and damp the air. The the temperature and force it into the respective cool damp air impinging on the hot bottles from chambers. the chamber A sets up a considerable amount of The'invention will be fully described with refevaporation therefrom with cooling effect. An- 35 erence to the accompanying drawings:- other fan H3 draws air out of the chamber'to Figs-1a and 12) show a side elevation, Fig. lb assist the current or draught of air through it.

being a continuation of Fig. 1a. of the apparatus. Instead of the water baflies H the air may be Figs. 2a and 2b show a'plan of the apparatus. refrigerated by being forced in by the fan H4 49 Figs. 3a and 3bshow a longitudinal sectional over a refrigerating coil 713 (containing chilled 40 elevation of the apparatus. brine) and through the louvres h.

Figs. 4a and 41) show a sectional plan of the An air lock or air chamber F is formed atthe.

apparatus, entrance to the heating chamber A, by two pairs Fig. 5 is a sectional elevation of amodified conof swinging doors 1, fl a second air lock Fl is" 45 struction of air cooling or refrigerating apparaformed between the chambers A and B by the 45* tus. two pairs of swinging doors f2, f3 and a third air Fig. 6 is a transverse sectional elevation on line lock F2 is formed at the exit from the chamber 6-6 of Fig; 1a. Y B and between it and the chamber C by the two Fig. '7 shows a method of piling up anumber of pairs of swinging doors f4, f5. The several air crates G to traverse the chambers. locks F, Fl, F2 are each fitted with a quick mov- 501 The apparatus is constructed with three chaming conveyer d, dl, d2. bers A, B and C in alignment with traversing con- As shown in Fig. 6 the crates G are supported veyers D Dl mounted in the bottom of each upon or by roller tracks K, upon the rollers of chamber, apparatus E, El for treating and forcwhich the crates rest and are moved forward ing the air and air locks F, Fl, F2 to prevent the by the conveyer chain D which is provided with 5.)

suitable lugs to engage the crates. As shown in Fig. 7 the crates G may be traversed upon bogies or trucks GI which run on castors or wheels G2 in channel or other rails and are moved forward by lug chains D.

A pasteurizing apparatus constructed as here inbefore described enables the construction of the hot air chamber A to be very much cheapened, as, instead of its being a wrought-iron tanklike apparatus with its complement of bearings, shafts, chains and sprockets, it may be a lightly insulated enclosure constructed with a light frame with fibre cement. panels and air space walls or walls packed with some insulating material.

The second chamber B for cooling down the contents by chilled atmospheric "airimay be an enclosure of cheap material to containv the air as it is circulated. I

The third chamber C may simply be in the nature of the ordinary cold storage room in which the milk is stored necessitating no costbeyond that of the cold storage room (which is required in any'case) for this third chamber.

Where the ordinary dairy bogies or trolleys are employed a fiat course or track isprovided inthe chambers upon which the, ball bearing casters of the bogies or trolleyscan roll. The bogies or trolleys are moved through the chambers byohains or Worms or other moving apparatus which make contact with the trolleys, just above floor level or alternatively-with an extension frame upon the trolleys which may be actuated from'the top of the chambers or they may be moved by hand. A

.The crates G containing the bottles entered through the air lock F areplaced on the fast movingconveyer chain d iwhichcarries them throughthe swinging doors or shutters 1, fl into 5 the heating chamber A and on to the slow; mov-- ing conveyer D. iThe first pair of swing doors I close before the second pair ofswing doors .fl open thus preventing any outrush of heated air. The temperature of the heating chamber 'A is maintained at to F. by the circulation of the air in a closed circuit therein through the heating apparatus E and steam coils e. The crates-are picked up by the slow moving conveyer D which traverses them slowly through the chamber retaining them therein for the requisite period of 30 minutes. When the crates G arrive at the exit end of the heating chamber A they are picked up by another fast moving conveyer dl and traversed through the air lock Fl in the same manner as through the airlock F into the cooling chamber B and the doors or shutters act in the same manner. The crates are picked up and traversed-by another slow moving conveyer DI in the same mannerfis the conveyer D, through the cooling chamber B and are picked up by another fast moving conveyer d2 which traverses them'through the airlock F2 as previously described. The air is cooled by the refrigerating or cooling apparatus El through which atmospheric air is forced by the fan HI. The fast moving conveyer d2 deposits the crates G in the chamber C from which they can be transferred by manual or mechanical means into the cold storage to await delivery.

The crates G in their passage through the chambers may be placed upon and/or carried by skid tracks, roller tracks, trucks or bogies according to the space available and the number of crates to be handled. When the crates are carried on trucks or bogies the conveyer lugs contact with them instead of directly with the crates.

The doors or shutters of the air locks may be operated by direct contact with the crates or bogies or by electric or pneumatic devices controlled by contact with the crates or bogies.

What I claim as my invention and desire to protect by Letters Patent is:-

1. Pasteurizing apparatus for liquids in bottles comprising a plurality of chambers in alignment, horizontally disposed and maintained at different temperatures, automatic conveyers by which the .bottles are moved progressively through the chambers, air looks at the inlet to and outlet from the apparatus and between the several chambers, said air locks having doors or shutters at each end thereof, further automatic conveyers by which the bottles are traversed between the chambers and means adjacent to each chamber to heat or cool the air and force it into the respective chamber.

2. Pasteurizing apparatus for liquids in bottles comprising a plurality of chambers in alignment, horizontally disposed and maintained at different temperatures, automatic conveyers by which the bottles are moved progressively through the chambers, air locksat the inlet to and outlet from the apparatus and between the several chambers, said air locks having a pair of swinging doors at the inlet to each air lock and a second pair of swinging doors at the outlet from each air lock, and a quick moving conveyer connecting the outlet and inlet swinging doors between the several chambers. 3. Pasteurizing apparatus for liquids in bottles comprising a heating chamber, a cooling chamber and a cold storage chamber horizontally disposed in alignment, automatic conveyers by which the bottles are moved progressively through the chambers, air locks at the inlet to and outlet from the'apparatus and between the several chambers, said air locks having doors or shutters at each end thereof, a'steam heating coil adjacent the heating chamber, a fan to circulate air through the chamber and over the heating coil and air ducts forming'a closed circuit through which the hot air is passed to and from the chamber.

4. Pasteurizing apparatus for liquids in bottles comprising a heating chamber, a cooling chamber and a cold storage chamber horizontally disposed in alignment, automatic conveyers by which the bottles are moved progressively through the chambers,'air locks at the inlet to and outlet from the apparatus and'bet'ween the several chambers, said air locks having doors or shutters at each end. thereof, water cooled baflles adjacent the cooling chamber over which air is drawn, a fan to force the air into the chamber, and a second fan to withdraw air from the chamber as it becomes heated. I a

5. Pasteurizing apparatus as in claim 1 having low speed conveyors by which the bottles are moved through the chambers and high speed conveyers for traversing the bottles through the doors andthe air locks to reduce to a minimum the period during which the doors are open.

' ARTHUR GUY ENOCK. 

